Fonterra is signalling a full-year loss of up to $675 million for 2018-19.
The sheep and beef farm near Masterton was located through the tracing of animal movements from other affected farms.
The property is under legal controls restricting the movement of animals and other risk goods off the farm.
As part of the Government and sector group programme to eradicate the disease, all cattle on the farm will ultimately be culled, in agreement with the farmer concerned around timing.
This new property brings the total number of Infected Properties nationwide to 36. Biosecurity New Zealand expects to find further infected properties as the extensive tracing of animal movements continues.